On a more serious note, Francis does seem to be moving in certain areas against a 1000 years or so of Roman Catholic dogma, so I could see why some Catholics would be upset. On the other hand, they are the ones who work themselves into a corner through believing that the Pope speaks infallibly when he speaks to questions of faith and morals.

I was speaking ex cathedra in my last post (or maybe that was ex tempore).

Either way, I took a look at the link since then. Found this interesting line:

The letter does not accuse the Pope himself of being a heretic, but of supporting "heretical positions" on "marriage, the moral life and the Eucharist."

According to Dictionary.com, according to the Roman Catholic Church a heretic is "a baptized Roman Catholic who willfully and persistently rejects any article of faith." (Not sure how accurate that is.)

I'm not familiar enough with Catholic doctrine, or the nuances of papal infallibility to comment on whether the pope, by those standards, is a heretic, or is promoting heretical teaching. I have a friend with whom I've served on a couple of accreditation teams who is a priest, and his perspective is that the more reform Pope Francis can get on the table, and the faster he can get it there, the better.